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From: ajb@blakey.WPI.EDU (Arthur J. Butler)
Newsgroups: comp.lang.c++,wpi.ccc
Subject: Unaligned data error with AT&T 2.1 on DECStation
Message-ID: <1991Jun17.184541.6472@wpi.WPI.EDU>
Date: 17 Jun 91 18:45:41 GMT
Sender: news@wpi.WPI.EDU (News)
Organization: Worcester Polytechnic Institute
Lines: 23
Originator: ajb@blakey
Nntp-Posting-Host: blakey.wpi.edu


hi.  i'm running AT&T C++ 2.1 (3/19/90) on a DECStation.

	[ULTRIX V4.1 (Rev. 52) System #1: Tue Jan 15 15:25:58 EST 1991
		UWS V4.1 (Rev. 197)]

for some programs when i compile (default arguments -- i tried various
levels of optimization include -O0), i get the following error at RUN
TIME:

	Fixed up unaligned data access for pid 7468 (example4) at pc 0x406cb0
	Fixed up unaligned data access for pid 7468 (example4) at pc .....
		--- continues for 10 or so lines of same stuff ---

some programs function properly after printing out these messages
while some do not.  not all programs exhibit this phenomena.

i have yet to find a small program which causes this problem - so i
cannot be more specific at this time.  any ideas on what might be
causing this, so i know where to look??  thanks.

arthur butler (ajb@ee.wpi.edu)